Sorbus aucuparia, or European mountain ash, is non-native to Ontario, originating in Europe and Western Asia and is considered to have invasive tendencies as it is known to naturalize and outcompete native trees and shrubs in North America. It prefers a moist, well-drained soil that is rich in organic matter, and does not do well in waterlogged or overly dry soil. This species is often short-lived and does not tolerate compacted soil. Its fruits provide a valuable food source for birds, but it is known for having poor branch connections. It is considered moderately messy due to the fruit drop and leaf litter that require regular cleanup. A good alternative is Sorbus americana.